Method of producing polysaccharide derivatives

C - Chemistry – Metallurgy – 08 – B

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C08B 37/08 (2006.01) A61K 47/48 (2006.01)

Patent

CA 2651102

A polysaccharide derivative having a high solubility in an aqueous solvent is produced. The production method of the present invention uses a compound shown by the general formula (1) as a condensing agent and allows a polysaccharide having a carboxyl group to react an organic compound having a functional group capable of condensing with the carboxyl group to prepare the polysaccharide derivative: R1 and R2 independently represent a substituent selected among alkyl groups of 1 to 4 carbon atoms and aryl groups of 6 to 8 carbon atoms; Z- represents a counter anion; and E+ represents an organic group shown as: R3, R4, and R5 independently represent an organic group having at least one carbon atom directly bound to a quaternary nitrogen atom and any two or all of R3, R4, and R5 may link together to form a cyclic structure.

L'invention concerne une méthode de production d'un dérivé de polysaccharides ayant une haute solubilité dans un solvant aqueux. La méthode de production de la présente invention utilise un composé de formule générale (1) en guise d'agent condensateur et permet à un polysaccharide comprenant un groupe carboxyle de réagir avec un composé organique qui possède un groupe fonctionnel capable de se condenser avec le groupe carboxyle pour préparer le dérivé de polysaccharide : R1 et R2 représentent indépendamment un substituant choisi parmi des groupes alkyles contenant de 1 à 4 atomes de carbone et des groupes aryles de 6 à 8 atomes de carbone ; Z- représente un contre-anion ; et E+ représente un groupe organique montré comme : R3, R4, et R5 représentent indépendamment un groupe organique comprenant au moins un atome de carbone directement lié à un atome d'azote quaternaire et deux quelconques de R3, R4, et R5 ou tous les trois peuvent se lier pour former une structure cyclique.

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